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Next: <a href="Plugins-tracking.html" accesskey="n" rel="next">Keeping track of available passes</a>, Previous: <a href="Plugins-recording.html" accesskey="p" rel="prev">Recording information about pass execution</a>, Up: <a href="Plugins.html" accesskey="u" rel="up">Plugins</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html" title="Index" rel="index">Index</a>]</p>
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<h3 class="section" id="Controlling-which-passes-are-being-run"><span>24.8 Controlling which passes are being run<a class="copiable-link" href="#Controlling-which-passes-are-being-run"> &para;</a></span></h3>

<p>After the original gate function for a pass is called, its result
- the gate status - is stored as an integer.
Then the event <code class="code">PLUGIN_OVERRIDE_GATE</code> is invoked, with a pointer
to the gate status in the <code class="code">gcc_data</code> parameter to the callback function.
A nonzero value of the gate status means that the pass is to be executed.
You can both read and write the gate status via the passed pointer.
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